The fame of the quotation is entirely due to its occurrence in William Shakespeare's play Julius Caesar, as Caesar utters these words as he is being stabbed to death, having recognized his friend and protégé Brutus among the assassins. However, there is no evidence that Caesar actually said these words.[1][2]

Another common translation for the phrase is "You too, Brutus?". Literally, the Latin phrase translates to "and" (or "also") "you, Brutus?". The name "Brutus", a second declensionmasculine noun, appears in the phrase in the vocative case, and so the -us ending of the nominative case is replaced by -e.[3]

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On March 15 (the Ides of March), 44 BCE, Caesar was attacked by a group of senators, including Marcus Junius Brutus, Caesar's friend and protégé. Caesar initially resisted his attackers, but when he saw Brutus, he supposedly spoke those words and resigned himself to his fate.

Caesar's last words are not known with certainty and are a contested subject among historians. The phrase Et tu, Brute? maintains its familiarity from William Shakespeare's play Julius Caesar (1599), where it actually forms the first half of a macaronic line: "Et tu, Brute? Then fall, Caesar!"[4] Shakespeare in turn was making use of a phrase already in common use in his time: it appears for example, in Richard Eedes's Latin play Caesar Interfectus of 1582 and The True Tragedie of Richarde Duke of Yorke &c of 1595, the earliest printed version of Henry VI, Part 3.[5]

The phrase follows in the tradition of the Roman historian Suetonius, who reports that others have claimed Caesar's last words were the Greek phrase "καὶ σὺ, τέκνον;", transliterated as "Kai su, teknon?".[6] The phrase means "You too, child?" or "You too, young man?" but has commonly been interpreted as meaning "You too, my child?" and taken as an indication that Brutus was Caesar's illegitimate son. In Robert Harris' book, Dictator, the phrase is translated as "Even You?" and is directed by Caesar to Decimus Brutus rather than to Marcus Junius Brutus.[7]

There is no reliable evidence that Caesar ever spoke the words. Suetonius himself claims Caesar said nothing as he died, and that others only reported that Caesar said that phrase after recognizing Brutus.[8][9][10]Plutarch also reports that Caesar said nothing and merely pulled his toga over his head when he saw Brutus among the conspirators.[11]

It has been argued that the phrase can, if Caesar said it, be interpreted as a curse or threat.[12][13][14] One theory states Caesar adapted the words of a Greek sentence which to the Romans had long since become proverbial:[12] The complete phrase is said to have been "You too, my son, will have a taste of power," of which Caesar only needed to invoke the opening words to foreshadow Brutus' own violent death, in response to his assassination.[12] In a similar vein, Caesar's words have been interpreted to mean "Your turn next."[14] and "To hell with you too, lad!"[14] In some other languages, for example Italian, the best-known version of Caesar's last words is a more literal Latin translation of the Greek phrase reported and dismissed by Suetonius: Tu quoque, mi fili. This version is reported, for example, in Charles François Lhomond's De Viris Illustribus,[15] an 18th-century summary of Roman history, which was long used as a standard text by Latin students.

In 1992, the genie character in Aladdin (voiced by Robin Williams) made a reference to the line. In 1994, the American band Spin Doctors made a song for their album Turn It Upside Down called "Cleopatra's Cat" referencing this quotation. In 2011, the Red Hot Chili Peppers album I'm With You included the song "Even You, Brutus?". In season five, episode two of Community, during an argument between Jeff and Annie, Troy exclaims the phrase while also questioning if he is using it right. In 2013, an episode of Key & Peele Season 3 called High On Potenuse, Jordan Peele character use the phrase to show incredibility when being mocked by a nerdy girl.